package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.heima.apis.article.IArticleClient;
import com.heima.apis.schedule.IScheduleClient;
import com.heima.common.aliyun.GreenImageScan;
import com.heima.common.aliyun.GreenTextScan;
import com.heima.minio.MinIoTemplate;
import com.heima.model.article.dtos.ArticleDto;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.schedule.dto.Task;
import com.heima.model.wemedia.pojos.WmChannel;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmSensitive;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.utils.OcrUtil;
import com.heima.utils.ProtostuffUtil;
import com.heima.utils.SensitiveWordUtil;
import com.heima.wemedia.mapper.WmSensitiveMapper;
import com.heima.wemedia.service.AutoScanService;
import com.heima.wemedia.service.WmChannelService;
import com.heima.wemedia.service.WmNewsService;
import com.heima.wemedia.service.WmUserService;
import lombok.extern.slf4j.Slf4j;
import net.sourceforge.tess4j.TesseractException;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;
import org.checkerframework.checker.units.qual.C;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Slf4j
public class AutoScanServiceImpl implements AutoScanService {

    @Autowired
    private WmNewsService wmNewsService;

    @Autowired
    private MinIoTemplate minIoTemplate;

    @Autowired
    private GreenTextScan greenTextScan;

    @Autowired
    private GreenImageScan greenImageScan;

    @Autowired
    private IArticleClient iArticleClient;

    @Override
    @Async
    public void autoScanWmNews(Integer newsId) throws Exception {

        if(newsId == null){
            log.warn("newsId为空");
            return;
        }
        //查询新闻信息
        WmNews wmNews = wmNewsService.getById(newsId);
        if(wmNews == null){
            log.warn("新闻"+newsId+"为空");
            return;
        }
        //提取新闻文字
        String title = wmNews.getTitle();
        String content = wmNews.getContent();
        String text = getText(title, content);
        //提取新闻图片
        String images = wmNews.getImages();
        List<byte[]> imagesList = getImages(images, content);

        //用OCR提取图片中的文字
        String textFromOcr = ocrCheck(imagesList);
        text = text + "_" +textFromOcr;

        //DFA算法自检敏感词
        Boolean dfaResult = dfaCheck(text);
        if (!dfaResult) {
            // DFA检测不通过,更新文章状态
            updateWmNews(2, "DFA审核未通过", null, newsId);
            return;
        }

        //审核文字
        Map textScan = greenTextScan.greeTextScan(text);
        Boolean textScanResult = checkResult(textScan, null, newsId);
        if(!textScanResult){
            log.warn("文字审核失败");
            return;
        }

        Map imageScan = greenImageScan.imageScan(imagesList);
        Boolean imageScanResult = checkResult(textScan, null, newsId);
        if(!imageScanResult){
            log.warn("图片审核失败");
            return;
        }

        ArticleDto dto = wmNews2ArticleDto(wmNews);
        ResponseResult responseResult = iArticleClient.saveArticle(dto);
        if(responseResult == null || responseResult.getCode()!= 200){
            log.warn("文章保存失败");
            return;
        }
        Long articleId = (Long) responseResult.getData();

        updateWmNews(9,"审核通过",articleId,newsId);

    }

    @Autowired
    private WmChannelService wmChannelService;

    @Autowired
    private WmUserService wmUserService;

    @Autowired
    private WmSensitiveMapper wmSensitiveMapper;

    private String ocrCheck(List<byte[]> images) throws IOException, TesseractException {

        if (CollectionUtils.isEmpty(images)) {
            return "";
        }

        StringBuilder builder = new StringBuilder();

        for (byte[] image : images) {
            // 调用ocr工具类，提取里面的文字内容
            ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(image);
            BufferedImage read = ImageIO.read(byteArrayInputStream);

            String text = OcrUtil.doOcr(read);

            // 将文字内容组合成一个字符串，最终返回
            builder.append("_").append(text);
        }
        return builder.toString();
    }

    private Boolean dfaCheck(String text) {
        if (StringUtils.isBlank(text)) {
            return true;
        }

        // 0.1 调用敏感词Mapper，查询所有敏感词
        QueryWrapper<WmSensitive> wrapper = new QueryWrapper<>();
        wrapper.select("sensitives");
        List<WmSensitive> wmSensitives = wmSensitiveMapper.selectList(wrapper);
        if (CollectionUtils.isEmpty(wmSensitives)) {
            return true;
        }

        List<String> words = wmSensitives.stream().filter(Objects::nonNull).map(WmSensitive::getSensitives).collect(Collectors.toList());
        if (CollectionUtils.isEmpty(words)) {
            return true;
        }

        // 0.2 DFA初始化
        SensitiveWordUtil.initMap(words);

        // 0.3 DFA敏感词匹配
        Map<String, Integer> result = SensitiveWordUtil.matchWords(text);

        // 0.4 判断结果
        return CollectionUtils.isEmpty(result);
    }

    private ArticleDto wmNews2ArticleDto(WmNews wmNews){
        if(wmNews == null){
            return null;
        }
        ArticleDto dto = new ArticleDto();
        BeanUtils.copyProperties(wmNews,dto);
        dto.setLayout(wmNews.getType());
        //查询渠道名称
        Integer channelId = wmNews.getChannelId();
        if(channelId != null){
            WmChannel channel = wmChannelService.getById(channelId);
            if(channel != null) {
                dto.setChannelName(channel.getName());
            }
        }

        Integer userId = wmNews.getUserId();
        if(userId != null){
            dto.setAuthorId(userId.longValue());
            WmUser wmUser = wmUserService.getById(channelId);
            if(wmUser != null) {
                dto.setAuthorName(wmUser.getName());
            }
        }
        return dto;
    }

    private Boolean updateWmNews(Integer status,String reason,Long articleId,Integer newsId){
        WmNews wmNews = new WmNews();
        wmNews.setId(newsId);
        wmNews.setStatus(status.shortValue());
        wmNews.setReason(reason);
        if(articleId != null){
            wmNews.setArticleId(articleId);
        }
        return wmNewsService.updateById(wmNews);
    }

    private Boolean checkResult(Map result,Long articleId,Integer newsId){
        if(CollectionUtils.isEmpty(result)){
            log.warn("审核为空");
            return true;
        }
        String suggestion = (String) result.get("suggestion");
        if("pass".equals(suggestion)){
            return true;
        }else if("blank".equals(suggestion)){
            updateWmNews(2,"审核未通过",articleId,newsId);
            return false;
        }else if("review".equals(suggestion)){
            updateWmNews(3,"转人工审核",articleId,newsId);
            return false;
        }
        return true;
    }

    private String getText(String title,String content){
        if(StringUtils.isBlank(content)){
            return title;
        }

        List<Map> maps = JSON.parseArray(content, Map.class);
        if(CollectionUtils.isEmpty(maps)){
            return title;
        }
        StringBuilder builder = new StringBuilder();
        for (Map map : maps) {
            if(CollectionUtils.isEmpty(map)){
                continue;
            }
            Object type = map.get("type");
            if("text".equals(type)){
               String value = (String) map.get("value");
               builder.append(value);
            }
        }
        builder.append("_").append(title);
        return builder.toString();
    }

    private List<byte[]> getImages(String images,String content){
        //声明总的图片集合
        ArrayList<String> finalList = new ArrayList<>();
        //1.提取封面图
        if(StringUtils.isNotBlank(images)){
            String[] split = images.split(",");
            if(ArrayUtils.isNotEmpty(split)){
                List<String> list = Arrays.asList(split);
                finalList.addAll(list);
            }
        }

        if(StringUtils.isNotBlank(content)){
            List<Map> maps = JSON.parseArray(content, Map.class);
            if(!CollectionUtils.isEmpty(maps)){
                for (Map map : maps) {
                    if(CollectionUtils.isEmpty(map)){
                        continue;
                    }
                    Object type = map.get("type");
                    if("image".equals(type)){
                        String value = (String) map.get("value");
                        finalList.add(value);
                    }
                }
            }
        }
        List<byte[]> result = new ArrayList<>();
        if(!CollectionUtils.isEmpty(finalList)){
            for (String url : finalList) {
                if(StringUtils.isEmpty(url)){
                    continue;
                }
                byte[] bytes = minIoTemplate.downLoadFile(url);
                result.add(bytes);
            }
        }
        return result;
    }

    @Autowired
    private IScheduleClient iScheduleClient;

    @Scheduled(fixedRate = 1000)
    public void getTask(){
        ResponseResult responseResult = iScheduleClient.poll();
        if(responseResult == null && responseResult.getCode() != 200){
            log.warn("消费失败");
            return;
        }
        String data = (String) responseResult.getData();
        if(StringUtils.isEmpty(data)){
            log.warn("没有可消费的任务");
            return;
        }
        Task task = JSON.parseObject(data, Task.class);
        if(task == null){
            log.warn("没有可消费的任务");
            return;
        }
        byte[] parameters = task.getParameters();
        WmNews wmNews = ProtostuffUtil.deserialize(parameters, WmNews.class);
        if(wmNews == null){
            log.warn("参数缺失");
            return;
        }
        try {
            autoScanWmNews(wmNews.getId());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
